Hamburg public transport (abbreviated to HVV) is extensive and efficient, comprising U-Bahn (underground), S-Bahn (overground), bus and ferry routes within the city centre as well as several “regional” train services to Hamburg suburbs and beyond. The five public transport zones span from central A and B out to regional E, some 60 kilometres outside the city. The Hamburg Card—available online, at HVV vending machines, service centres, tourist offices and many hostels and hotels—is a popular tourist choice, covering all forms of public transport within the central A and B zones, with additional discounts at many of the city’s museums, restaurants and stores. A one-day card, which is valid until 6am the following morning, costs €9.90 for one adult and up to three children under the age of 14. A three-day card costs €25.50. There are also regular HVV day, week and month passes, without the attraction discounts. You do not need to validate your ticket, but should keep it on hand in case of inspection. Children under the age of six travel for free across the HVV. Almost all central Hamburg stations are wheelchair accessible, with designated points on the platform to board the train.